18ct Yellow Gold Blue John Large Square Ring, R605. This striking ring is part of our Heritage handmade jewellery collection and features a beautifully polished cabochon of Blue John, directly sourced from the Castleton, Derbyshire. The contemporary design features an open shank underneath the stone, and is completed with a wide statement 18ct yellow gold band.  All our Blue John jewellery is designed and crafted within our very own workshops in Ashbourne, Derbyshire where a team of skilled craftsmen transform natural pieces of Blue John into these stylish pieces of jewellery. You can find other matching Blue John jewellery our website and in our stores. All articles are lovingly and securely dispatched with our elegant jewellery packaging.